'use strict'
const path = require('path')
const defaultSettings = require('./src/settings.js')
const CompressionPlugin = require('compression-webpack-plugin');

function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || 'template' // page title
// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// const port = 9528 // dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  publicPath: '/',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development',
  productionSourceMap: false,
  // devServer: {
  //   port: port,
  //   open: true,
  //   overlay: {
  //     warnings: false,
  //     errors: true
  //   },
  //   // proxy: {
  //   //   // change xxx-api/login => mock/login
  //   //   // detail: https://cli.vuejs.org/config/#devserver-proxy
  //   //   [process.env.VUE_APP_BASE_API]: {
  //   //     target: `http://127.0.0.1:${port}/mock`,
  //   //     changeOrigin: true,
  //   //     pathRewrite: {
  //   //       ['^' + process.env.VUE_APP_BASE_API]: ''
  //   //     }
  //   //   }
  //   // },
  //   // after: require('./mock/mock-server.js')
  // },
  devServer: {
    open: false,
    host: '0.0.0.0',
    port: 8080,
    https: false,
    hotOnly: false,
    proxy: { // 配置跨域
        '/api': {
            target: 'http://localhost:5000',
            ws: true,
            changOrigin: true,
            pathRewrite: {
                '^/api': ''
            }
        }
    },
    before: app => { },
    disableHostCheck:true
  },
  configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    },
    // plugins:[
    //   new CompressionPlugin({
    //     algorithm: 'gzip',
    //     test: /\.js$|\.html$|\.css$/, // 匹配文件名
    //     filename: '[path].gz[query]', // 压缩后的文件名(保持原文件名，后缀加.gz)
    //     minRatio: 1, // 压缩率小于1才会压缩
    //     threshold: 10240, // 对超过10k的数据压缩
    //     deleteOriginalAssets: false, // 是否删除未压缩的源文件，谨慎设置，如果希望提供非gzip的资源，可不设置或者设置为false（比如删除打包后的gz后还可以加载到原始资源文件）
    //   })
    // ]
  },
  chainWebpack(config) {
    config.plugins.delete('preload') // TODO: need test
    config.plugins.delete('prefetch') // TODO: need test

    config.plugin('CompressionPlugin').use(
      new CompressionPlugin({
        filename: '[path].gz[query]', // 压缩后的文件名(保持原文件名，后缀加.gz)
        algorithm: 'gzip', // 使用gzip压缩
        test: new RegExp('\\.(' + ['js', 'css'].join('|') + ')$'), // 匹配文件名
        threshold: 512, // 对超过512k的数据压缩
        minRatio: 1 // 压缩率小于0.8才会压缩
      })
    )

    // set svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(resolve('src/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()

    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config
    // https://webpack.js.org/configuration/devtool/#development
      .when(process.env.NODE_ENV === 'development',
        config => config.devtool('cheap-source-map')
      )

    config
      .when(process.env.NODE_ENV !== 'development',
        config => {
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
            // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.js$/
            }])
            .end()
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'initial' // only package third parties that are initially dependent
                },
                elementUI: {
                  name: 'chunk-elementUI', // split elementUI into a single package
                  priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                  test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                },
                commons: {
                  name: 'chunk-commons',
                  test: resolve('src/components'), // can customize your rules
                  minChunks: 3, //  minimum common number
                  priority: 5,
                  reuseExistingChunk: true
                }
              }
            })
          config.optimization.runtimeChunk('single')
        }
      )
  },
  
}
